.panel-default {
    margin-bottom: 0;
    border-color: #dddddd4d;
}

.panel-default > .panel-heading {
    background-color: #ffffff;
    border-color: #dddddd4d;
}

.video {
    margin-top: 20px;
}

.video .series .module {
    line-height: 100px;
    vertical-align: middle;
}

.video .series .module .item .line {
    float: left;

}

.video .series .module .item .line hr {
    margin-top: 49px
}

.video .series .module .item .icon {
    float: left;
    color: #dddddd;
    position: relative;

}

.video .series .module .item .icon .up, .video .series .module .item .icon .down {
    position: absolute;
    line-height: 49px;
    min-width: 90px;
    left: 0;
    text-align: center;
    margin-left: -38px;
    color: #878787;
}

.video .series .module .item:hover .icon, .video .series .module .item:hover .icon {
    color: #4284F3;
}

.video .series .module .item.active .icon {
    color: #4284F3;
}

.video .series .module .item.active .icon .up, .video .series .module .item.active .icon .down {
    color: #4284F3;
}

.video .series .module .item .icon .up {
    top: 0;
}

.video .series .module .item .icon .down {
    bottom: 0;
}

.left {
    float: left;
}

.course-items {
    margin-top: 10px;
    display: grid;
    grid-template-columns: repeat(4, 283px);
    grid-Gap: 12px;
    Gap: 12px;
    justify-content: center;
}

.course-box {
    width: 282px;
    height: 235px;
    /*float: left;*/
    background: #fff;
    border-radius: 8px;
    cursor: pointer;
    border: 1px solid #d7d7d7;
    position: relative;
}

.course-box > a {
    text-decoration: none;
    color: #000;
    outline: none;
}

.course-box dl {
    height: 100%;
    padding: 10px;
}

.course-box dl dt {
    width: 100%;
    height: 130px;
    margin-right: 30px;
}

.course-box dl dt img {
    width: 100%;
    height: 100%;
}

.course-box dl dd .name p:first-child {
    color: #333;
    margin: 8px 0 4px;
    font-size: 14px;
    font-weight: 700;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
}

.course-box dl dd .name p:last-child {
    font-size: 12px;
    color: #ababab;
    margin-bottom: 8px;
}

.course-box dl dd .price {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.course-box dl dd .price span:first-of-type {
    color: #d7261f;
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
}

.course-box dl dd .price span:first-of-type i {
    background: #d62119;
    color: #fff;
    font-size: 12px;
    padding: 2px 4px;
    font-weight: 700;
    margin-right: 2px;
}

.course-box dl dd .price span:nth-of-type(2) {
    color: #aaa;
    text-decoration: line-through;
}

.course-box dl dd .go {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 7px;
}

.course-box dl dd .go p {
    display: flex;
    align-items: center;
    color: #ababab;
    font-size: 14px;
    height: 28px;
    margin: 0;
}

.course-box dl dd .go p img {
    margin-right: 5px;
}

button {
    width: 64px;
    height: 28px;
    background: #ffc210;
    color: #fff;
    font-size: 12px;
    border-radius: 4px;
    transition: all .2s ease-in-out;
    cursor: pointer;
    outline: none;
    border: none;
}

button:hover {
    color: #fff;
    background: #f7bc72;
    border: 1px solid #f7bc72
}
